KNNTree

    public static KNNTree makeTree(ClusRun cr, ClusNode source,
            VectorDistance vd) {
        KNNTree node = new KNNTree(cr, vd);
        node.m_Test = source.m_Test;
        node.m_ClusteringStat = source.m_ClusteringStat;
 
        int arity = source.getNbChildren();
        node.setNbChildren(arity);
 
        for (int i = 0; i < arity; i++) {
            ClusNode child = (ClusNode) source.getChild(i);
            node.setChild(KNNTree.makeTree(cr, child, vd), i);
        }
        return node;
    }
//这是Clus里面的KNNTree类中的建树代码，有些糊涂